Enhanced Associative Memory, Classification, and Learning with Active Dynamics

• Published in: Physical review. X 2023-12, Vol.13 (4), p.041043, Article 041043
• Main Authors: Behera, Agnish Kumar, Rao, Madan, Sastry, Srikanth, Vaikuntanathan, Suriyanarayanan
• Format: Article
• Language: English
• ISSN: 2160-3308; 2160-3308
• DOI: 10.1103/PhysRevX.13.041043

Motivated by advances in the field of active matter where nonequilibrium forcing has been shown to activate new assembly pathways, here we study how nonequilibrium driving in prototypical memory formation models can affect their information processing capabilities. Our results reveal that activity can provide a new and surprisingly general way to dramatically improve the memory and information processing performance of the memory-forming systems without the need for additional interactions or changes in connectivity. Nonequilibrium dynamics can allow these systems to have memory capacity, assembly or pattern recognition properties, and learning ability, in excess of their corresponding equilibrium counterparts. Our results demonstrate the generality of the enhancement of memory capacity arising from nonequilibrium, active dynamics when compared to noise sources characteristic of equilibrium dynamics. These results are of significance to a variety of processes that take place under nonequilibrium dynamics, and involve information storage and retrieval, as well as in silico learning and memory-forming systems for which nonequilibrium dynamics may provide an approach for modulating memory formation.